While generally well-tolerated, potential issues include can include side effects such as Nausea, and fatigue. Individuals with shellfish allergies should exercise caution or seek shellfish-free (corn-based) options. Do not take or consult your doctor if you are on medications such as Warfarin, Diabetes medications or Tylenol. Also do not take if you have conditions such as asthma, glaucoma, liver disease, pregnant or if you are within two weeks of surgery.